Stop-cock.



L. s. STACEY. STOP 0001! APPLIdATIOI FILED KAY 14,1909.

Patented July 5, 1910.

,LYMAN S. STACEY, QTHNCY, MASSACHUSETTS.

STOP-COCK.

- Specification of Letters Patent.

Applicatioafiled May 14, 1909. Serial No. 496,062.

To all whom 'i't may concern:

Be it known that I, LYMAN -S. S'rAcEY, a citizen of the United States, residing Quincy, in the county of Norfolk, State of Massachusetts, have invented a certain new and useful Improvement in Stop-Qocks, of

which the followingis a specification, refer-' ence being had therein to the accompanying drawings. l.

My invention has for its object an improvement in stop cocks of the kind eme ployed in hose or other pipes such as are used to convey compressed air to pneumatic tools, and the like. k I

Theparticular object of my invention is to provide a sto cock which shall be less likely to leak t an those heretofore employed; which shall be constantly and automatically lubricated; and which may be at-.

tached to and detached from the hose with less'danger of injury to the hose and more rapidly than has heretofore been possible.

The stop cock embodying my invention is no more expensive to construct than those at present employed, but by reason of my invention much less difiiculty is experienced in its use than with stop cocks'as heretoforeconstructed. The stop cock embodying my invention will also by reason of its'peculiar cons ruction remain in good order for a muc longer timethan those heretofore employed.

The invention will be fully understood from the following description taken in connection with the accompanying drawings,

and the novel features are pointed out and clearly defined in the claims at the close of this specification.

' In the drawings, Figure 1 my invention. Fig.2 is'a similar view of vation of the movable valve member. Fig. 1 is a view of the packing and spr ng, re- 45.

moved. Fig. 5 is a view of the cap. which I closes the central opening of the stop cook.

Referring now to the drawings and more articularly to Figs. 1 and 2.there will be seen at 11 the body of the stop cockhaving at 12 a tapered central cavity, to receive the movable valve member. The body 11 of the stop cock is provided with two tubular arms 13 and 141 to receive the hose in the line of which the stopcock is located, or 1f desired one of these arms may be constructed is" anielevation partly in section of a istopcockjembe dy ing shorter thanthe interior cavity Patented Jmy 5, 1910.

for connection with the hose, while the other may be threaded for connection with the.

pneumatic tool. When employed for connection to a hose, a tapering'mpple having a smooth end 15 of 'a diameter slightly less than the bore of the hose and round screw' threads 16 ending in asharp shoulder17 is emplgyed. Between the shoulder 17 and the body of the cock 11 is a neck or constricted portion 18. From the foregoing it will be seen that the hose 19 is screwed onto the nipple until the end of the hose passes the sharp shoulder 17 and lies along the neck or constricted portion 18, nearly in contact with the body of the stopcock as shown in Fig. 1. When thus constructed the stop cock may be readily attached to the hose 'or detached therefrom without injury to the hose and will remain connected to ahose even after it has become softened and weakened by constant use. If desired a spring band 20 may be employed. This is desirable where the hose is very poor. 7

, The-valve member2l is tapered as shown in Fig. 3 with its large end at .thebottom and aastem 22 squared as shown at 23 to receivea handle 24 at the top.' The 'ort 25 registers when the valve is open wlth the two passages 26through the two arms 13 and 1a. The shoulder of the valve member 21 is rounded asshown at 27, and the interounded as shown at 28. The movable valve member 21 is of such a size that the shoulder 27 will not rest against therounded p ortion 28 "and a packing 29 of any suitable fibrous material, such as im regnated waste,

. is placed between the shou der 27 and the rounded portion of thebore of the body of Y the stopcock. It will be seen that any ain 9s which gets the valve member 21 into the the body of the stop cock. Fig. 3 isLahele 1 cavityin'whlch the. packing 29 is contained will exert a pressure upon-thepacking and hold the packing tightly about the valve stem '22, therebypreventing itescaping about the stem.

ioo

The valve member "21-" is' considerably by the screw cap 32 and this screw cap 32 cavity 12 in spite of wear on the respective surfaces of the valve member and valve body. The spring 31 is so proportioned that the user may press the spring down by the handle 24 if desired. The space within the spiral spring 31 is occupiedby a porous packing 132 which is capable of absorbing.

lubricating oil. In practice I use ordinary cotton waste. This waste is thoroughly saturated with oil before the screwcap 32 is put in place. When the user turns the handle 24: of the stop cock in either direction he ordinarily presses down slightly on the handle 24 since the movable valve member being forced up into the tapering cavity 12 tends to stick slightly. The downward movement of the valve member by this action compresses slightlythe saturated waste and the oil which is forced out of the waste is driven up around the movable valve-member between it and the walls of the stop cock body lubricating this thoroughly. When the operator takes his hand off the handle the pres.- sure isreleased and the valve member is forced upward by the spring 31 into its usual position. This causes most of the oil to flow back again into the packing 132 but leaves a film adhering to the parts which is suflicient to lubricate them thoroughly.

I find in practice that in valves embodying my invention the parts are constantly lubricated and that the small amount of oil 'necessaryto saturate the packing will keep the parts in proper condition for a very considerable'length of time.

The washer 30 which is placed between the spring 31 and the movable valve member 21 protects the bottom of the valve member from the spring 31. The valve member would otherwise be likely to be scored by the spring which is much harder than the material of which the valve member is made and this scoring would 'cause the valve to stick and the. particles from the valve member would work between the valve member and its seat and cause leakage. By interposing the washer between the valve member and the spring all wear on the valve member is obviated since the washer remains still and the valve member turnson the washer.

What I claim is:

1. An improved stop cockicomprising a valve-body having a tapering valve-seat, a tapering valve-member located therein, a compressible absorbent packing capable of containing a fluid lubricant located between valve-member normally in contact with its seat, whereby lubricant is forced out of the packing whenever the valve-member is moved-off its seat. f

2. The improved stop cock having a tapering valve-member, a valve body' having a correspondingly tapering valve-seat, a compressible absorbent packlng capable of containing a lubricant, said packing being compressed when the valve-member is moved off its seat, and a spring to hold the valvemember normally in contact with its seat.

3. The improved stop cook havin a tapering valve-member, a valve-body aving a -correspo'ndingly tapering valve-seat, a compressible absorbent packing capable of containing a lubricant, a spring to hold the valve-member normally in contact with its seat, and a handle on said valve-member said handle being located opposite to said packing, whereby the pressure applied to the handle in turning the valve-member tends to compress the packing and force the lubricant out of the packing.

4. The improved stop-cock comprising a valve body having a tapering valve seat, a taperin valve member, a cap closing the cavity formed in said valve body by said tapering valve seat, a compressible absorbent packing capable of contaming lubricant between the said valve member and the said cap, said packing being compressed when the valve member is moved ofl 1ts seat, and a spring tending to hold the said valve member in contact with its seat.

In testimony whereof I afiix my signature, in presence of two witnesses.

LYMAN s. STACEY.

a fportion of the valve-member and a portion o the valve-seat, and a spring to hold the 

